<h1>Testing React Applications</h1>
<p>Testing is crucial for maintaining high-quality React applications. Let&#39;s explore different testing strategies and tools.</p>
<h2>Testing Tools</h2>
<ul>
<li>Jest</li>
<li>React Testing Library</li>
<li>Cypress</li>
<li>MSW (Mock Service Worker)</li>
</ul>
<h2>Example Tests</h2>
<pre><code class="language-jsx">import { render, screen, fireEvent } from &quot;@testing-library/react&quot;;
import userEvent from &quot;@testing-library/user-event&quot;;
import Counter from &quot;./Counter&quot;;

describe(&quot;Counter&quot;, () =&gt; {
  test(&quot;renders counter with initial value&quot;, () =&gt; {
    render(&lt;Counter /&gt;);
    expect(screen.getByText(&quot;Count: 0&quot;)).toBeInTheDocument();
  });

  test(&quot;increments counter when button is clicked&quot;, async () =&gt; {
    render(&lt;Counter /&gt;);
    const button = screen.getByRole(&quot;button&quot;, { name: /increment/i });
    await userEvent.click(button);
    expect(screen.getByText(&quot;Count: 1&quot;)).toBeInTheDocument();
  });
});
</code></pre>
<h2>Testing Strategies</h2>
<ol>
<li>Unit Testing</li>
<li>Integration Testing</li>
<li>End-to-End Testing</li>
<li>Snapshot Testing</li>
</ol>
